simple UPDATE query in MySQL take a long time

Question

I have a problem with simple update query what always appearing in my mysql-slow-query.log table is not big and contain just only 3021 rows.

the query looks like :

UPDATE 'address' 
SET 'user' = 1013 
WHERE 'id_adress' = '1' 
    AND 'date' = '2012-06-04'

Query_time: 2.664413 Lock_time: 0.000043 Rows_sent: 0 Rows_examined: 1

when I examinate this query with:

select  'user' = 1013 
from 'address' 
where  'id_adress' = '1' 
   AND 'date' = '2012-06-04'

then looks very fast 1 row in set (0.00 sec)

Why this simple update query take such a lot of time? How to fix it?

Answer 1

first check if your table is not crashed,
if it is then repair your the table.

second try to index those two fields used in where clause